4.7 timing belt

I am kicking around the idea of putting money into my '01 Tundra and fixing it up. I still have the original timing belt with 252K miles

 

My 03 Sequoia is still on it’s OG at 158k I have all the parts just need to do it. We’ve put less than 1k of those miles on. Bought it from the sister in-law.

 

Changed my 02’ at 120k miles. Probably will change again at the 200k-220k mark. Did all the peripherals (water pump, cam seal,etc) at same time. Cheap insurance. Good to hear these longevity stories. Max I’d go without a change is 150k based on everyones stories.

 

Look up Aircabinman on ebay. He does a lot of Toyota tune-up kits and stuff like that. I got both the timing belt kits for my 4runner and my tundra from him. Shipping time was excellent and free if i remember correctly.

 

My 02 Tundra has OG timing belt up to 244k miles. I replaced at 244k.

 

Wow, that’s pretty good! Nice to know. How did the old belt look?

 

It still looks okay, doesn’t show any cracked.

 

Just bought an 06 Tundra in April with 84k miles and am now at 92k after spending a few months touring. 1st truck and loving it. I'm currently just north of Seattle and looking for a shop to have my 90k mile service done. My plan is to have the

$183 Aisin tkt-021 Engine Timing Belt Kit with Water Pump - Compatible with Select Lexus GS400, GS430, GX470, LS400, LS430, LX470, SC400, SC430 Toyota 4Runner, Land Cruiser, Sequoia, Tundra

Aisin tkt-021 timing kit installed along with a new thermostat, gasket and serpentine belt. Does anyone have any mechanic in washington or oregon that they would recommend? The local dealer wanted almost $2,000.

 

If it breaks, it doesn’t hurt anything, it’s a non interference engine, meaning valves will be safe.

 

Care to provide any evidence or literature on this claim?

 

I’ve heard it’s more hit or miss. A lot of guys get lucky and nothing happened. But I’ll bet a few have grenade their engines as well.

 

Ive read both from LC, LX, 4Runner and tundra owners. Seems like VVT-i makes a difference as well.

 

Yeah. Was reading on another Tundra site where their Belts broke and they put a new one on and she started right back up and ran fine.

 

I have a 2000, 4.7 Tundra and 9 months ago the water pump froze and blew up the timing belt and one of the pulleys. A few thousand dollars later, the top end has been rebuilt. Four of the cylinders had issues with the valves.

 

Bummer bud. So it was the pump that caused the belt failure? You had a new(er) belt? Pump was replaced at same time as belt, but the pump still failed? Just curious for feedback purposes. Thanks.

 

Here's the short story, I just wrote the long one below:
The pump caused the belt failure. Original Belt at 188,000 miles, pump was replaced at 89,000.

The pump was sometimes working and then heat would spike, then it would subside, so I thought it was a steam dome in the engine. The timing belt was I believe the original and yes I should have changed it when I did the WP in '05 when it went bad at 89,000 miles, but I didn't. So the truck was at around 188,000 when the pump started its issues. I had started the truck to try and get the steam dome out of the engine, but alas, the pump seized and I was in the house so I didn't hear anything.... The engine just kept running and burned up the belt. My mechanic said it was a mess in there with the melted, shredded belt.

So we had the top end rebuilt, and now the differential is leaking so I asked my mechanic to give it a thorough once over and...… The frame is shot. But Toyota is going to replace that.. So now we need to hear all the "you should replace this since we have it apart" parts that we should do. Toyota said the diff will run us around $2000. But with all the "new" on the truck, it looks like it would be worth it as I can't see putting a used diff in it for just a little bit less.

 

Still hoping to get a recommendation for a good shop to do my timing chain. I'm at 94k and am in Northern California now... am willing to travel a bit.. any suggestions would he wonderful.

 

Take her to the stealership. All your parts need to come from there all will cost an arm and a leg anyways. Might as well have them do the work.

 

I changed out the original timing belt at 90k, I didn't change that belt for another 160k, no issues with either belt when changed, no visible cracking. I used a Gates kit the last time because they are an OE supplier.

 

Come to think about it, I’ve not heard of anybodys timing belt breaking on these 1st Gens.

With so much scare about these being interference engines, I’ve not heard a thread here or anywhere for that matter about their belt breaking.

I do hear people saying they have 130-200k on their original belts. Maybe the hype is not real?

 

My timing belt didn't break on its own, it had help. By way of the water pump seizing and destroying the belt. $7000 later, the engine is rebuilt.

 

You are the first I’ve heard. Bummer man. These water pumps are important. Good thing to keep the rad fluid new too so all the seals stay lubed.

 

Mine was changed for the 2nd time yesterday. 1st time was @ 86k and yesterday was @ 276K. That is 190K interval. Belt looked very good but was much flimsier, obviously. I saved it for comparison, pic.

Bought

$183 Aisin TKT-021 Engine Timing Belt Kit with Water Pump - Compatible with Select Lexus GS400, GS430, GX470, LS400, LS430, LX470, SC400, SC430 Toyota 4Runner, Land Cruiser, Sequoia, Tundra

Aisin TKT-021 kit off Amazon. Also replaced drive belt and thermostat.

 

Thanks for the Aisin link...$250CAN is pretty cheap for seal belt pump and idlers...

My Tundra with 255,000 miles is all original except for the starter and still purring like a kitten

I'm considering doing the swap myself. I'm guessing 5-6 hours....

What specialty tools do I need for this job?

Are cam seals recommended to be replaced?

Thanks

 

I just bought a 2005 with 203k on it and the original belt. It still looked fine. However the water pump was leaking a bit. I changed everything else in there with a kit from ebay. All OEM parts. I'd say the bigger risk is the pump failing than the belt breaking. However I did see a 2000 Tundra at the Toyota dealership while they were changing the belt and it looked near breaking. Only 107k on it...

You can pretty easily pull one of the covers off a bit and see what it looks like. But I'd just do it. Took me 7 hours from start to finish including building the harmonic balancer/pulley tool although this is the third 4.7 belt change I've done. The tool is just a piece of bar with a hole for the socket to go through and two 3/8" holes for bolts to go through to thread into the balancer.

I wouldn't touch the cam seals unless they are leaking. Mine is a little bit but unfortunately it's a 2005 with the VVTI cams and it's a pain in the ass to change. So I'll live with the weap for now.

 

Hey folks, I am going to be replacing the timing belt/water pump in next week or so and am looking for best kit . I noticed on kit mentioned above (

$183 TKT-021 Engine Timing Belt Kit with Water Pump - Compatible with Select Lexus GS400, GS430, GX470, LS400, LS430, LX470, SC400, SC430 Toyota 4Runner, Land Cruiser, Sequoia, Tundra

TKT-021) the Amazon add describes the kit and says it is a Aisin water pump but does not have Aisin stamped on it. My question is, do the Aisin water pumps generally have Aisin stamped on them ? If so , would this kit be ok or should I look elsewhere? I did see a kit somewhere that said it was factory oem and the water pump box ( not the actual pump) was stamped with Toyota all over it rather than Aisin.

 

I cant remember if it has Aisin stamped on it or not, but I have put that kit in 4 different 4.7's and all the parts are legit.

 

Ok, thanks Seth

 

I would recommend adding upper and lower radiator hoses to the list. Since the coolant is drained already, this is an easy addition. Also, spark plugs since it is close to the time for those as well (every 120k miles).

Dan

 

Thanks Dan , I'm planning on going through everything.